2-Amino-5-benzoylbenzimidazole

2-氨基-5-苯甲酰苯并咪唑

Also known as: Mebendazole-amine, Mebendazole impurity A, Mebendazole related compound A, (2-amino-1H-benzimidazol-5-yl)(phenyl)methanone, (2-amino-1H-benzo[d]imidazol-5-yl)(phenyl)methanone, 2-Amino-5-benzoyl-1H-benzimidazole, G 1029, R 18986, Ketone, 2-amino-5-benzimidazolyl phenyl, Ketone, 2-amino-6-benzimidazolyl phenyl, 2-Amino-5(6)-benzoylbenzimidazole

2-Amino-5-benzoylbenzimidazole (CAS 52329-60-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C14H11N3O and a molecular weight of 237.25700 g/mol. It is also known as Mebendazole-amine, Mebendazole impurity A and Mebendazole related compound A. Key properties include a melting point of 176-185°C, a boiling point of 504.5ºC at 760 mmHg, a density of 1.351g/cm3 and a flash point of 258.9ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 52329-60-9
Jingsj CID: J-1962510-4
Molecular Formula: C₁₄H₁₁N₃O
Chinese Name: 2-氨基-5-苯甲酰苯并咪唑
Molecular Weight: 237.25700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	176-185°C
Boiling Point	504.5ºC at 760 mmHg
Density	1.351g/cm3
Flash Point	258.9ºC
Exact Mass	237.09000
PSA	72.50000
LogP	2.30620
Refractive Index	1.738
Storage Conditions	-20°C Freezer, Under Inert Atmosphere

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed

Activity & Biological Data

Additional Information	[1]. Majewsky M, et al. Systematic identification of suspected anthelmintic benzimidazole metabolites using LC-MS/MS. J Pharm Biomed Anal. 2018;151:151-158. [2]. Pantziarka P, et al. Repurposing Drugs in Oncology (ReDO)-mebendazole as an anti-cancer agent. Ecancermedicalscience. 2014;8:443. Published 2014 Jul 10.

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 2-Amino-5-benzoylbenzimidazole?

The CAS number of 2-Amino-5-benzoylbenzimidazole is 52329-60-9.

What are the molecular formula and molecular weight of 2-Amino-5-benzoylbenzimidazole?

2-Amino-5-benzoylbenzimidazole has molecular formula C14H11N3O and molecular weight 237.25700 g/mol.

Is 2-Amino-5-benzoylbenzimidazole hazardous?

2-Amino-5-benzoylbenzimidazole has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.

What are the upstream and downstream products of 2-Amino-5-benzoylbenzimidazole?

For 2-Amino-5-benzoylbenzimidazole, Downstream Products: Mebendazole.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "2-Amino-5-benzoylbenzimidazole (CAS 52329-60-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1962510-4 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.